Bump github.com/prometheus/client_golang from 0.9.3 to 1.11.1

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 0.9.3 to 1.11.1.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md)
- [Commits](prometheus/client_golang@v0.9.3...v1.11.1)

---
updated-dependencies:
- dependency-name: github.com/prometheus/client_golang
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/pelletier/go-toml v1.6.0 // indirect
-	github.com/prometheus/client_golang v0.9.3
+	github.com/prometheus/client_golang v1.11.1
 	github.com/sirupsen/logrus v1.7.0
 	github.com/spf13/afero v1.2.2 // indirect
 	github.com/spf13/cast v1.3.1 // indirect
@@ -19,9 +19,7 @@ require (
 	github.com/stretchr/testify v1.6.1 // indirect
 	golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2 // indirect
 	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 // indirect
-	golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57 // indirect
 	golang.org/x/text v0.3.6 // indirect
 	google.golang.org/grpc v1.21.1
 	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
-	gopkg.in/yaml.v2 v2.3.0 // indirect
 )